Heat overload relay



FIG. 1 is a top plan view of a heat overload relay showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a perspective view thereof.

The broken line portion in the drawings is included to show unclaimed subject matter only and forms no part of the claimed design. 

The ornamental design for the heat overload relay, as shown and described. 